Page:Popular Science Monthly Volume 88.djvu/312

 284

��Popular Science Monthly

��Filter for Lubricating Oil

THE apparatus to be described was made for the purpose of filtering oil' pumped from the crankcase of a ma- rine gas engine after it had been used in the cylinders and bearings of the engine. The oil filtered out perfectly

����\-Aupporf ^^\''orpaper

fig. 5

���The oil is poured into the container through the paper filter, and collects in the container to be drawn when needed

��Strap iron was riveted together and three legs riveted on, as shown, with holes for holding down screws bored in the feet. Three angle pieces of sheet iron H H H, were riveted on to the ring G for the bot- tom of the container to rest on.

Another ring J was riveted together of a size to slip easily into the container. Then a cone was made up of copper wire gauze K and soldered to the bottom of the ring / as shown. Two or three sheet iron clips L L, riveted to / and bent over the outside edge of the con- tainer, served to hold the cone in place. This wire gauze is intended as a support for the filter paper, which is folded up into a cone as shown in Fig. 4 and placed inside the wire gauze cone. The oil is then poured into the paper and will slowly filter through and collect in the bottom of the container. It can either be drawn oft' by the valve as needed or be allowed to run through all the time and be col- lected in a can or other recep- tacle.

It may require some experi- menting to find the best kind of paper to use, but for oil such as "Havoline" or "Monogram" or- dinary brown wrapping paper or even newspaper is perfectly sat- isfactory. Unsized paper is of course preferable, because of its porous character.

��clear and was used over and over with perfect success.

Referring to the drawings, A is the container, made of zinc with soldered and riveted seams, about 16" high and \A" in diameter. On one end of the cyHnder^/^ was soldered the cone-shaped part D with a %" brass pipe coupling E soldered into the small end. A brass shut-off cock F was screwed into this coupling as shown. A loose-fitting cover was made to fit the open end of the con- tainer. This cover B was about V-/' larger in diameter than the container, and had a handle C riveted on to the top.

To support this container a ring of

��Fuse for Storage Battery Circuits

APIECE of glass tul)ing of small diameter is cut into pieces about one inch long. Small holes are drilled in the bottoms of used cartridge shells. The shells should be as nearly the size of the tubes as possible. They are then put on the ends of the tubes and a short length of German silver wire is put through the holes in the shells and soldered. The size of the wire can best be determined by experiment. Two fuses made in this way are fastened to a block of wood by four small clips and the fuse block is done.

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